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 #include &lt;QtGui&gt;

 #include &quot;movieplayer.h&quot;

 MoviePlayer::MoviePlayer(QWidget *parent)
     : QWidget(parent)
 {
     movie = new QMovie(this);
     movie-&gt;setCacheMode(QMovie::CacheAll);

     movieLabel = new QLabel(tr(&quot;No movie loaded&quot;));
     movieLabel-&gt;setAlignment(Qt::AlignCenter);
     movieLabel-&gt;setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
     movieLabel-&gt;setBackgroundRole(QPalette::Dark);
     movieLabel-&gt;setAutoFillBackground(true);

     currentMovieDirectory = &quot;movies&quot;;

     createControls();
     createButtons();

     connect(movie, SIGNAL(frameChanged(int)), this, SLOT(updateFrameSlider()));
     connect(movie, SIGNAL(stateChanged(QMovie::MovieState)),
             this, SLOT(updateButtons()));
     connect(fitCheckBox, SIGNAL(clicked()), this, SLOT(fitToWindow()));
     connect(frameSlider, SIGNAL(valueChanged(int)), this, SLOT(goToFrame(int)));
     connect(speedSpinBox, SIGNAL(valueChanged(int)),
             movie, SLOT(setSpeed(int)));

     mainLayout = new QVBoxLayout;
     mainLayout-&gt;addWidget(movieLabel);
     mainLayout-&gt;addLayout(controlsLayout);
     mainLayout-&gt;addLayout(buttonsLayout);
     setLayout(mainLayout);

     updateFrameSlider();
     updateButtons();

     setWindowTitle(tr(&quot;Movie Player&quot;));
     resize(400, 400);
 }

 void MoviePlayer::open()
 {
     QString fileName = QFileDialog::getOpenFileName(this, tr(&quot;Open a Movie&quot;),
                                currentMovieDirectory);
     if (!fileName.isEmpty())
         openFile(fileName);
 }

 void MoviePlayer::openFile(const QString &amp;fileName)
 {
     currentMovieDirectory = QFileInfo(fileName).path();

     movie-&gt;stop();
     movieLabel-&gt;setMovie(movie);
     movie-&gt;setFileName(fileName);
     movie-&gt;start();

     updateFrameSlider();
     updateButtons();
 }

 void MoviePlayer::goToFrame(int frame)
 {
     movie-&gt;jumpToFrame(frame);
 }

 void MoviePlayer::fitToWindow()
 {
     movieLabel-&gt;setScaledContents(fitCheckBox-&gt;isChecked());
 }

 void MoviePlayer::updateFrameSlider()
 {
     bool hasFrames = (movie-&gt;currentFrameNumber() &gt;= 0);

     if (hasFrames) {
         if (movie-&gt;frameCount() &gt; 0) {
             frameSlider-&gt;setMaximum(movie-&gt;frameCount() - 1);
         } else {
             if (movie-&gt;currentFrameNumber() &gt; frameSlider-&gt;maximum())
                 frameSlider-&gt;setMaximum(movie-&gt;currentFrameNumber());
         }
         frameSlider-&gt;setValue(movie-&gt;currentFrameNumber());
     } else {
         frameSlider-&gt;setMaximum(0);
     }
     frameLabel-&gt;setEnabled(hasFrames);
     frameSlider-&gt;setEnabled(hasFrames);
 }

 void MoviePlayer::updateButtons()
 {
     playButton-&gt;setEnabled(movie-&gt;isValid() &amp;&amp; movie-&gt;frameCount() != 1
                            &amp;&amp; movie-&gt;state() == QMovie::NotRunning);
     pauseButton-&gt;setEnabled(movie-&gt;state() != QMovie::NotRunning);
     pauseButton-&gt;setChecked(movie-&gt;state() == QMovie::Paused);
     stopButton-&gt;setEnabled(movie-&gt;state() != QMovie::NotRunning);
 }

 void MoviePlayer::createControls()
 {
     fitCheckBox = new QCheckBox(tr(&quot;Fit to Window&quot;));

     frameLabel = new QLabel(tr(&quot;Current frame:&quot;));

     frameSlider = new QSlider(Qt::Horizontal);
     frameSlider-&gt;setTickPosition(QSlider::TicksBelow);
     frameSlider-&gt;setTickInterval(10);

     speedLabel = new QLabel(tr(&quot;Speed:&quot;));

     speedSpinBox = new QSpinBox;
     speedSpinBox-&gt;setRange(1, 9999);
     speedSpinBox-&gt;setValue(100);
     speedSpinBox-&gt;setSuffix(tr(&quot;%&quot;));

     controlsLayout = new QGridLayout;
     controlsLayout-&gt;addWidget(fitCheckBox, 0, 0, 1, 2);
     controlsLayout-&gt;addWidget(frameLabel, 1, 0);
     controlsLayout-&gt;addWidget(frameSlider, 1, 1, 1, 2);
     controlsLayout-&gt;addWidget(speedLabel, 2, 0);
     controlsLayout-&gt;addWidget(speedSpinBox, 2, 1);
 }

 void MoviePlayer::createButtons()
 {
     QSize iconSize(36, 36);

     openButton = new QToolButton;
     openButton-&gt;setIcon(QIcon(&quot;:/images/open.png&quot;));
     openButton-&gt;setIconSize(iconSize);
     openButton-&gt;setToolTip(tr(&quot;Open File&quot;));
     connect(openButton, SIGNAL(clicked()), this, SLOT(open()));

     playButton = new QToolButton;
     playButton-&gt;setIcon(QIcon(&quot;:/images/play.png&quot;));
     playButton-&gt;setIconSize(iconSize);
     playButton-&gt;setToolTip(tr(&quot;Play&quot;));
     connect(playButton, SIGNAL(clicked()), movie, SLOT(start()));

     pauseButton = new QToolButton;
     pauseButton-&gt;setCheckable(true);
     pauseButton-&gt;setIcon(QIcon(&quot;:/images/pause.png&quot;));
     pauseButton-&gt;setIconSize(iconSize);
     pauseButton-&gt;setToolTip(tr(&quot;Pause&quot;));
     connect(pauseButton, SIGNAL(clicked(bool)), movie, SLOT(setPaused(bool)));

     stopButton = new QToolButton;
     stopButton-&gt;setIcon(QIcon(&quot;:/images/stop.png&quot;));
     stopButton-&gt;setIconSize(iconSize);
     stopButton-&gt;setToolTip(tr(&quot;Stop&quot;));
     connect(stopButton, SIGNAL(clicked()), movie, SLOT(stop()));

     quitButton = new QToolButton;
     quitButton-&gt;setIcon(QIcon(&quot;:/images/quit.png&quot;));
     quitButton-&gt;setIconSize(iconSize);
     quitButton-&gt;setToolTip(tr(&quot;Quit&quot;));
     connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

     buttonsLayout = new QHBoxLayout;
     buttonsLayout-&gt;addStretch();
     buttonsLayout-&gt;addWidget(openButton);
     buttonsLayout-&gt;addWidget(playButton);
     buttonsLayout-&gt;addWidget(pauseButton);
     buttonsLayout-&gt;addWidget(stopButton);
     buttonsLayout-&gt;addWidget(quitButton);
     buttonsLayout-&gt;addStretch();
 }</pre>
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